Actions

In step 4, click Add Action to define what your node does. Each action has:

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Parameters tab
Execute (JS) tab
Sample output (json) tab

Parameter validation

Validate required fields early and return clear errors.

//can only access: parameters, log(), fetch()

if(!parameters.name) throw new Error('Name is required')
if(!parameters.age) throw new Error('Age is required')
if(parameters.age < 18) throw new Error("Too young")

API call example

const url = "https://jsonplaceholder.typicode.com/posts";  //Endpoint for testing
const data = {
    name: parameters.name,
    age: parameters.age,
};

const response = await fetch(url, {
    method: "POST",
    headers: {
        "Content-Type": "application/json"
    },
    body: JSON.stringify(data)
});

return response;

Return format

The action response is already an object or an array of objects. Do not parse it again with response.json().

Debugging

Use the right panel:

Outputs to inspect returned data
Errors to view thrown validation messages
Logs to trace execution

Keep output JSON stable. Downstream workflow mappings rely on this structure.

Triggers Versions and Publish

​Actions

​Parameter validation

​API call example

​Return format

​Debugging

Actions

Parameter validation

API call example

Return format

Debugging